Sure Klean® Weather Seal Siloxane PD Water Repellent Specification
Specifier Note: The information provided below is intended to guide the Architect in developing
specifications for products manufactured by P ROSOCO, Inc. and should not be viewed as a complete
source of information about the product(s). The Architect should always ref er to the Product Data Sheet
and MS DS for additional recommendations and for safety information. See also PROSOCO S ection
07190 Water Repellents.
Specifier Note: Paragraph below is for PA RT 1 GENE RAL, Quality Assurance.
Test a minimum 4 ft. by 4 ft. area on each type of masonry. Use the manufacturer’s application
instructions. Let test area protective treatment cure before inspection. Keep test panels available for
comparis on throughout the protective treatment project.
Specifier Note: Paragraphs below are for PART 2 PRODUCTS, Manuf acturers and Products.
Manufacturer: PROS OCO, Inc., 3741 Greenway Circle, Lawrence, KS 66046. Phone: (800) 255-4255; Fax:
(785) 830-9797. E-mail: CustomerCare@prosoco.com
Product De scription
Sure Klean Weather Seal Siloxane PD (predilute) is a ready to-use, water-based silane/siloxane water
repellent for concrete, GFRC, and most masonry and stucco surfaces. Siloxane PD is a low-V OC
treatment that penetrates more deeply than conventional water repellents and helps masonry resist
cracking, spalling, staining and other damage related to water int rusion. Low odor and alkaline stable,
Siloxane PD is ideal for field and in -plant application.
FORM: White milky liquid
SPECIFIC GRAV ITY: 0.998
FLASH POINT: > 200 degrees F (>93 degrees C) (AS TM D 3278
VOC: 203 grams/liter (AS TM D 3960)
FREE ZE POINT: 32 degrees F (0 degrees C)
Won’t keep wat er out of cracks, defects or open joints.
Water repellency of treated surfaces will increase for up to 14 days after application.
Specifier Note: Paragraphs below are for PART 3 EXECUTION, Installation.
Before applying, read “Protect” and “Precautionary Measures” sections in the Manufacturer’ s Product
Data Sheet for Weather Seal Siloxane P D. Refer to the P roduct Data Sheet for additional information
about application of Weather Seal Siloxane PD. Do not dilute or alter.
Vertical Application Instructions
1. For best results, apply protective treatment “wet-on-wet” to a visibly dry and absorbent
2. Alternate Application Methods
Spray: Saturate from the bottom up, creating a 4” to 8” (15 to 20 cm) rundown below the
spray contact point. Let the first application penetrate for 5 -10 minutes. Res aturate. Less will
be needed for the second application.
Brush or roller: Saturate uniformly. Let protective treatment penetrate for 5 to 10 minutes.
Brush out heavy runs and drips that don’t penetrate.
Dense Surface Application Instructions
Apply in a single, saturating application with no run down. Back roll all runs and drips to
ensure uniform appearance. DO NOT OVER APPLY. One application is normally enough.
Horizontal Application Instructions
1. Saturate in a single application. Use enough to keep the surface wet for 2 to 3 minut es
2. Broom out puddles until they soak in. Treated surfaces dry to touch in 1 hour. Protect
surfaces from rainfall for 6 hours following treatment. Many surfaces need several days to
develop full water repellency.